Cory Doctorow, writing for The Guardian, suggests that hiding your email address has become a waste of time:

I publish my email address, because I have yet to see any compelling evidence that hiding your email address or using silly techniques like spelling it out (doctorowATcraphoundDOTcom) is any proof against email harvesters. I can think of a way of detecting and converting such obfuscated email addresses, and if I can think of it, so can some spambot author, and she can write the code to do it.

The upshot: You can't necessarily stop spambots from finding you and spam filtering tools are so good nowadays that it doesn't really matter. For these reasons, Doctorow believes that it's not even worth trying to conceal your email address. Do you?